The Earth is Within You. - The Art :P
Well the dress is Inspired by the Ocean, I cant do it blue due to color Count.
My First time dithering so I could have some CC.
Had some Upload bugs on the Preview. .-.
This peice has only 8 colors plus transparency, not 11. You have plenty of room to make the dress a more oceanic blue.
Also, actual black can work against you as some programs will read it as alpha. Try a dark green that is indestinguishable from black to the naked eye.
Its the other way around :p
Transparency is required for the background, but you can keep your current image for the preview. And the dithering works on the hair it give a bit of texture. Not sure about the bit on the stomach area though :)
Please re-read the challenge rules.